A latecomer following the Imam in offering Sujud-ul-Sahw

Q 1: If the Imam (the one who leads congregational Prayer) says Taslim (salutation of peace ending the Prayer) and then performs Sujud-ul-Sahw (Prostration of Forgetfulness), because of missing an action in the Salah (Prayer), should the Ma'mum (a person being led by an Imam in Prayer) follow him, even if they are latecomers? What is the ruling if they do not follow him?

A: If the Imam performs Sujud-ul-Sahw, it is obligatory on the Ma'mum to follow him, even if they are latecomers. If they do not follow the Imam and stand up to perform what they have missed, their Salah is correct, but they should perform Sujud-ul-Sahw before saying the Taslim.